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hulianui: a React component library with 349 components, OKLCH runtime theming, and its own llms.txt for AI coding assistants

A developer built hulianui, a React component library with 349 components, OKLCH runtime theming, and an llms.txt file for AI coding assistants. The library includes deep-end components like Gantt charts and ProTable, and is designed to be good-looking by default while allowing AI tools to read its documentation verbatim. The theming system uses OKLCH color space and Tailwind v4 for runtime CSS-variable changes without reload or flash.

read2 min views3 publishedJul 9, 2026

There's no shortage of React component libraries. What's missing is one that's good-looking by default, covers the deep-end components nobody ships, and can be read verbatim by your AI coding assistant. That's why I built hulianui ( @hulianui/ui) — "Hulian" for short.

If you're in a hurry:

pnpm add @hulianui/ui @hulianui/tokens

Here's how it differs from shadcn/ui, MUI, and Ant Design, and a few design decisions I'm proud of.

I'm not trying to out-Ant-Design enterprise dashboards, and this isn't another shadcn reskin. The real pain is that these three things are rarely true at the same time:

hulianui is aimed squarely at all three.

The theming system is built on the OKLCH color space + Tailwind v4 @theme, split into two token layers:

--color-primary

/ --color-surface

/ --color-hairline

, etc. Components only ever consume semantic tokens.The payoff: theme switching is just runtime CSS-variable changes — no reload, no flash.

import { ThemeProvider } from "@hulianui/ui";

// Light/dark is a data-theme-driven pure CSS-variable swap — zero repaint flash
<ThemeProvider defaultSetting="system">
  <App />
</ThemeProvider>

Dark mode isn't a naive color inversion either — there's a theme-aware shadow system (dark mode uses a white inset rim-light instead of drop shadows) and a "hairline" border token (light mode separates with shadow, dark mode with a 1px border). You can tweak all of it live in the theme docs.

This is hulianui's biggest differentiator. Beyond the usual forms/tables/nav/feedback, it ships a batch of components that are hard to find in generic libraries and painful in every project — all zero/light-dependency, all on the same token skin:

Component What it does Docs
Gantt Read-only CSS-grid percentage layout, UTC date math, today line, zero deps

And these aren't isolated demos — I built a dozen complete, real admin apps with them, 100% dogfooded, in the live demos:

The real test of a component is whether it dares to power full business pages, not just a storybook cell.

This is the part I think is most ahead of the curve. hulianui serves a spec-compliant llms.txt machine-readable corpus at the site root:

So when you onboard with Cursor, Claude Code, or Copilot, you feed it llms.txt and it writes code from ground truth instead of training memory — no guessed prop names, no hallucinated APIs. Every component doc page also has a "Copy MD for AI" button.

In a world where "let the AI write the feature" is the daily default, that might be more useful than a few more components.

pnpm add @hulianui/ui @hulianui/tokens
python
// Single barrel import
import { Button, ProTable, Gantt } from "@hulianui/ui";

If you also believe people shouldn't have to work against ugly software, give it a try — and tell me in the comments the one component your project keeps fighting with. hulianui might already have it.

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